but the design is still valid for noneasily flamable materials - plywood,mini-SIPS [Estimate ~1-2in foam core and less flamable skins.] etc.Say, 1&1/2x1&1/2 perimeter frame, foam core, then skin material.Use those for all panels, including the bottom/base [Or maybeincrease that thickness a bit on that.],

The sixfoot looks like it'd be "roomy" for one person. The point-to-pointmeasurement is 8foot, so that'd allow room for sleeping. The sixfoot stretchwould be quite roomy as they say it's a bit 'tight' for two:

They would be 'larger' than most single occupant shelters, as shown on thethread so far, but still not much larger than a TD or TTT. Bolt-together mini-SIPSwould work, especially if some of the panels are hinged together and foldflat for transport. This added fabrication is not as inexpensive as just the straightsheet material itself but it would give much longer life in use and more usefulcomfort/performance.

The basic design was done to use the standard 4x8 sheet size as the baseunit to allow full utilization of those with minimal waste. You could dimensionit somewhat smaller but it'd still cost what the full panel one would - unlessyou could figure out a way to utilize any trimmings in subsequent units.